onelinkmore UHF Female to Female Coupler Joiner Coax Jumper Cable Connector SO239 PL259 UHF VHF Antenna 4 Hole Flange Panel Mount Adapter Pack of 2 UHF Female to UHF Female Adapter/Converter Well Constructed and Connection Pins are Gold-plated for Secure Connections,Good for jumpers or cables indoors,CB or HAM UHF cable extention option Impedance :50 ohm Application for Antennas, Wireless LAN Devices , Coaxial cable, Wi-Fi Radios External Antenna and so on Package Content : 2 x UHF Female to UHF Female Adapter